ISO/IEC INTERNATIONAL STANDARD 14496-33 First edition 2019-02 Information technology - Coding of audio-visual objects - Part 33: Internet video coding Technologies de I'information Codage des objets audiovisuels - Partie 33:Codagevidéo Internet Reference number IEC ISO/IEC 14496-33:2019(E) @IS0/IEC 2019 IS0/IEC 14496-33:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0/IEC 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0/IEC 2019 - All rights reserved IS0/IEC 14496-33:2019(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope 2 Normative references 3 Terms and definitions 4 Abbreviations. .1 5 Conventions .7 5.1 Arithmetic operators .7 5.2 Logical operators . ..8 5.3 Relational operators. .8 5.4 Bitwise operators.. 5.5 Assignment. ..8 5.6 Order of operation precedence ..9 5.7 Mathematical functions. .9 5.8 Variables, syntax elements and tables. .10 5.9 Text description of logical operations.. ..11 5.10 Processes. .12 5.11 .12 5.11.1 Method of describing bitstream syntax .12 5.11.2 Syntax functions... ..14 5.11.3 Syntax descriptors. ..15 5.11.4 Reserved, forbidden and marker bit. .16 6 Source, coded, decoded and output data formats ..16 6.1 Source ..16 6.2 Colour format. 16 6.3 Codedbitstreamformat .17 6.4 Sequence header .17 6.5 Frame. ..17 6.6 Frametypes .17 6.7 Slice .18 6.8 Macroblock. .18 6.9 Block. .18 6.10 Frame re-ordering. .19 6.11 Reference frames.. .19 6.12 Inverse scanning processes and derivation processes for neighbours .20 6.12.1 General 20 6.12.2 Inverse macroblock scanning process .20 6.12.3 Inverse macroblock partition scanning process. .20 6.12.4 Inverse 8x8 luma block scanning process. 21 6.12.5 Inverse 4x4 luma block scanning process. .21 6.12.6 Derivation process of the availability for macroblock addresses .21 6.12.7 Derivation process for neighbouring macroblock addresses and their availability 22 6.12.8 Derivation processes for neighbouring macroblocks, blocks, and partitions. .23 6.12.9 Derivation process for neighbouring locations 25 7 Syntax and semantics .26 7.1 Bitstream syntax. .26 7.1.1 Start codes. .26 7.1.2 Video sequence .27 7.1.3 Frame. .28 7.1.4 Slice .30 7.1.5 Macroblock 30 @ IS0/IEC 2019 - All rights reserved iii